doc: add 'Getting help' to WebUI
doc: add 'Getting help' to WebUI

Former-commit-id: 909d0633fa2d970d30ccb0aa5548cbdec587b4f0 [formerly 40bc7a348989cb37b484ab82b7e5ac485a9d7b5b]
Former-commit-id: 80e50f0192e1128d318ce03ba3fdfa72aadba746
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine